[PATCH 2/6] jbd: use hlist for the revoke tables
Akinobu Mita
mita at miraclelinux.com
Fri Sep 9 08:44:41 UTC 2005
use struct hlist_head and hlist_node for the revoke tables.
Signed-off-by: Akinobu Mita <mita at miraclelinux.com>
---
revoke.c | 56 ++++++++++++++++++++++++++------------------------------
1 files changed, 26 insertions(+), 30 deletions(-)
diff -Nurp 2.6.13-mm1.old/fs/jbd/revoke.c 2.6.13-mm1/fs/jbd/revoke.c
--- 2.6.13-mm1.old/fs/jbd/revoke.c 2005-09-04 21:46:35.000000000 +0900
+++ 2.6.13-mm1/fs/jbd/revoke.c 2005-09-04 21:50:25.000000000 +0900
@@ -79,7 +79,7 @@ static kmem_cache_t *revoke_table_cache;
struct jbd_revoke_record_s
{
- struct list_head hash;
+ struct hlist_node hash;
tid_t sequence; /* Used for recovery only */
unsigned long blocknr;
};
@@ -92,7 +92,7 @@ struct jbd_revoke_table_s
* for recovery. Must be a power of two. */
int hash_size;
int hash_shift;
- struct list_head *hash_table;
+ struct hlist_head *hash_table;
};
@@ -119,7 +119,6 @@ static inline int hash(journal_t *journa
static int insert_revoke_hash(journal_t *journal, unsigned long blocknr,
tid_t seq)
{
- struct list_head *hash_list;
struct jbd_revoke_record_s *record;
repeat:
@@ -129,9 +128,9 @@ repeat:
record->sequence = seq;
record->blocknr = blocknr;
- hash_list = &journal->j_revoke->hash_table[hash(journal, blocknr)];
spin_lock(&journal->j_revoke_lock);
- list_add(&record->hash, hash_list);
+ hlist_add_head(&record->hash,
+ &journal->j_revoke->hash_table[hash(journal, blocknr)]);
spin_unlock(&journal->j_revoke_lock);
return 0;
@@ -148,19 +147,16 @@ oom:
static struct jbd_revoke_record_s *find_revoke_record(journal_t *journal,
unsigned long blocknr)
{
- struct list_head *hash_list;
+ struct hlist_node *node;
struct jbd_revoke_record_s *record;
- hash_list = &journal->j_revoke->hash_table[hash(journal, blocknr)];
-
spin_lock(&journal->j_revoke_lock);
- record = (struct jbd_revoke_record_s *) hash_list->next;
- while (&(record->hash) != hash_list) {
+ hlist_for_each_entry(record, node,
+ &journal->j_revoke->hash_table[hash(journal, blocknr)], hash) {
if (record->blocknr == blocknr) {
spin_unlock(&journal->j_revoke_lock);
return record;
}
- record = (struct jbd_revoke_record_s *) record->hash.next;
}
spin_unlock(&journal->j_revoke_lock);
return NULL;
@@ -219,7 +215,7 @@ int journal_init_revoke(journal_t *journ
journal->j_revoke->hash_shift = shift;
journal->j_revoke->hash_table =
- kmalloc(hash_size * sizeof(struct list_head), GFP_KERNEL);
+ kmalloc(hash_size * sizeof(struct hlist_head), GFP_KERNEL);
if (!journal->j_revoke->hash_table) {
kmem_cache_free(revoke_table_cache, journal->j_revoke_table[0]);
journal->j_revoke = NULL;
@@ -227,7 +223,7 @@ int journal_init_revoke(journal_t *journ
}
for (tmp = 0; tmp < hash_size; tmp++)
- INIT_LIST_HEAD(&journal->j_revoke->hash_table[tmp]);
+ INIT_HLIST_HEAD(&journal->j_revoke->hash_table[tmp]);
journal->j_revoke_table[1] = kmem_cache_alloc(revoke_table_cache, GFP_KERNEL);
if (!journal->j_revoke_table[1]) {
@@ -246,7 +242,7 @@ int journal_init_revoke(journal_t *journ
journal->j_revoke->hash_shift = shift;
journal->j_revoke->hash_table =
- kmalloc(hash_size * sizeof(struct list_head), GFP_KERNEL);
+ kmalloc(hash_size * sizeof(struct hlist_head), GFP_KERNEL);
if (!journal->j_revoke->hash_table) {
kfree(journal->j_revoke_table[0]->hash_table);
kmem_cache_free(revoke_table_cache, journal->j_revoke_table[0]);
@@ -256,7 +252,7 @@ int journal_init_revoke(journal_t *journ
}
for (tmp = 0; tmp < hash_size; tmp++)
- INIT_LIST_HEAD(&journal->j_revoke->hash_table[tmp]);
+ INIT_HLIST_HEAD(&journal->j_revoke->hash_table[tmp]);
spin_lock_init(&journal->j_revoke_lock);
@@ -268,7 +264,7 @@ int journal_init_revoke(journal_t *journ
void journal_destroy_revoke(journal_t *journal)
{
struct jbd_revoke_table_s *table;
- struct list_head *hash_list;
+ struct hlist_head *hash_list;
int i;
table = journal->j_revoke_table[0];
@@ -277,7 +273,7 @@ void journal_destroy_revoke(journal_t *j
for (i=0; i<table->hash_size; i++) {
hash_list = &table->hash_table[i];
- J_ASSERT (list_empty(hash_list));
+ J_ASSERT (hlist_empty(hash_list));
}
kfree(table->hash_table);
@@ -290,7 +286,7 @@ void journal_destroy_revoke(journal_t *j
for (i=0; i<table->hash_size; i++) {
hash_list = &table->hash_table[i];
- J_ASSERT (list_empty(hash_list));
+ J_ASSERT (hlist_empty(hash_list));
}
kfree(table->hash_table);
@@ -445,7 +441,7 @@ int journal_cancel_revoke(handle_t *hand
jbd_debug(4, "cancelled existing revoke on "
"blocknr %llu\n", (unsigned long long)bh->b_blocknr);
spin_lock(&journal->j_revoke_lock);
- list_del(&record->hash);
+ hlist_del(&record->hash);
spin_unlock(&journal->j_revoke_lock);
kmem_cache_free(revoke_record_cache, record);
did_revoke = 1;
@@ -488,7 +484,7 @@ void journal_switch_revoke_table(journal
journal->j_revoke = journal->j_revoke_table[0];
for (i = 0; i < journal->j_revoke->hash_size; i++)
- INIT_LIST_HEAD(&journal->j_revoke->hash_table[i]);
+ INIT_HLIST_HEAD(&journal->j_revoke->hash_table[i]);
}
/*
@@ -504,7 +500,6 @@ void journal_write_revoke_records(journa
struct journal_head *descriptor;
struct jbd_revoke_record_s *record;
struct jbd_revoke_table_s *revoke;
- struct list_head *hash_list;
int i, offset, count;
descriptor = NULL;
@@ -516,16 +511,16 @@ void journal_write_revoke_records(journa
journal->j_revoke_table[1] : journal->j_revoke_table[0];
for (i = 0; i < revoke->hash_size; i++) {
- hash_list = &revoke->hash_table[i];
+ struct hlist_head *hash_list = &revoke->hash_table[i];
- while (!list_empty(hash_list)) {
- record = (struct jbd_revoke_record_s *)
- hash_list->next;
+ while (!hlist_empty(hash_list)) {
+ record = hlist_entry(hash_list->first,
+ struct jbd_revoke_record_s, hash);
write_one_revoke_record(journal, transaction,
&descriptor, &offset,
record);
count++;
- list_del(&record->hash);
+ hlist_del(&record->hash);
kmem_cache_free(revoke_record_cache, record);
}
}
@@ -686,7 +681,7 @@ int journal_test_revoke(journal_t *journ
void journal_clear_revoke(journal_t *journal)
{
int i;
- struct list_head *hash_list;
+ struct hlist_head *hash_list;
struct jbd_revoke_record_s *record;
struct jbd_revoke_table_s *revoke;
@@ -694,9 +689,10 @@ void journal_clear_revoke(journal_t *jou
for (i = 0; i < revoke->hash_size; i++) {
hash_list = &revoke->hash_table[i];
- while (!list_empty(hash_list)) {
- record = (struct jbd_revoke_record_s*) hash_list->next;
- list_del(&record->hash);
+ while (!hlist_empty(hash_list)) {
+ record = hlist_entry(hash_list->first,
+ struct jbd_revoke_record_s, hash);
+ hlist_del(&record->hash);
kmem_cache_free(revoke_record_cache, record);
}
}
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